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-rw-r--r--src/basic/glob-util.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/basic/glob-util.c b/src/basic/glob-util.c
new file mode 100644
index 0000000..fd60a6e
--- /dev/null
+++ b/src/basic/glob-util.c
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "dirent-util.h"
+#include "errno-util.h"
+#include "glob-util.h"
+#include "macro.h"
+#include "path-util.h"
+#include "strv.h"
+
+static void closedir_wrapper(void* v) {
+ (void) closedir(v);
+}
+
+int safe_glob(const char *path, int flags, glob_t *pglob) {
+ int k;
+
+ /* We want to set GLOB_ALTDIRFUNC ourselves, don't allow it to be set. */
+ assert(!(flags & GLOB_ALTDIRFUNC));
+
+ if (!pglob->gl_closedir)
+ pglob->gl_closedir = closedir_wrapper;
+ if (!pglob->gl_readdir)
+ pglob->gl_readdir = (struct dirent *(*)(void *)) readdir_no_dot;
+ if (!pglob->gl_opendir)
+ pglob->gl_opendir = (void *(*)(const char *)) opendir;
+ if (!pglob->gl_lstat)
+ pglob->gl_lstat = lstat;
+ if (!pglob->gl_stat)
+ pglob->gl_stat = stat;
+
+ errno = 0;
+ k = glob(path, flags | GLOB_ALTDIRFUNC, NULL, pglob);
+ if (k == GLOB_NOMATCH)
+ return -ENOENT;
+ if (k == GLOB_NOSPACE)
+ return -ENOMEM;
+ if (k != 0)
+ return errno_or_else(EIO);
+ if (strv_isempty(pglob->gl_pathv))
+ return -ENOENT;
+
+ return 0;
+}
+
+int glob_first(const char *path, char **ret_first) {
+ _cleanup_globfree_ glob_t g = {};
+ int k;
+
+ assert(path);
+
+ k = safe_glob(path, GLOB_NOSORT|GLOB_BRACE, &g);
+ if (k == -ENOENT) {
+ if (ret_first)
+ *ret_first = NULL;
+ return false;
+ }
+ if (k < 0)
+ return k;
+
+ if (ret_first) {
+ char *first = strdup(g.gl_pathv[0]);
+ if (!first)
+ return log_oom_debug();
+ *ret_first = first;
+ }
+
+ return true;
+}
+
+int glob_extend(char ***strv, const char *path, int flags) {
+ _cleanup_globfree_ glob_t g = {};
+ int k;
+
+ k = safe_glob(path, GLOB_NOSORT|GLOB_BRACE|flags, &g);
+ if (k < 0)
+ return k;
+
+ return strv_extend_strv(strv, g.gl_pathv, false);
+}
+
+int glob_non_glob_prefix(const char *path, char **ret) {
+ /* Return the path of the path that has no glob characters. */
+
+ size_t n = strcspn(path, GLOB_CHARS);
+
+ if (path[n] != '\0')
+ while (n > 0 && path[n-1] != '/')
+ n--;
+
+ if (n == 0)
+ return -ENOENT;
+
+ char *ans = strndup(path, n);
+ if (!ans)
+ return -ENOMEM;
+ *ret = ans;
+ return 0;
+}